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JavaFX Boolean Binding and TableView Binding multiple


JavaFX Boolean Binding and TableView Binding multiple

By : gerald anand
Date : October 22 2020, 08:10 AM
will help you I want to bind a Button to two specific constraints. , You can use Bindings.or
like:
code :
deleteGroupage.disableProperty().bind(Bindings.isEmpty(tableView.getSelectionModel().getSelectedItems()).or(Bindings.createBooleanBinding(() -> !LoginController.loggedIn));
deleteGroupage.disableProperty().bind(Bindings.or(Bindings.isEmpty(tableView.getSelectionModel().getSelectedItems()),Bindings.createBooleanBinding(() -> !LoginController.loggedIn)));
deleteGroupage.disableProperty().bind(Bindings.createBooleanBinding(() -> tableView.getSelectionModel().getSelectedItems().isEmpty() || !LoginController.loggedIn, tableView.getSelectionModel().getSelectedItems()));


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Binding JavaFX 2 TableView elements

Binding JavaFX 2 TableView elements


By : deepa Shanmuga Sunda
Date : March 29 2020, 07:55 AM
will be helpful for those in need I was working on a small application using a simple binding in JavaFx 2.1 using java 1.7.0_04-b21 on MacOSX. Actually I currently compare the bind mechanisms of Cocoa on Mac OSX to the JavaFx and face several problems: , issue 1 -- you stepped into one of famous Java autoboxing traps.
code :
model.getMessageList().remove(selectedIndices2.get(i)); // get(i) returns Integer
model.getMessageList().remove(selectedIndices2.get(i).intValue());
    messageListTableView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Message>() {

        @Override
        public void changed(ObservableValue<? extends Message> ov, Message old, Message newM) {
            messageNameTextField.textProperty().unbindBidirectional(old.messageName);
            messageNameTextField.textProperty().bindBidirectional(newM.messageName);
        }
    });
public StringProperty messageNameProperty() {
    return messageName;
}
Binding Chart to TableView JavaFX

Binding Chart to TableView JavaFX


By : Saif nowrose
Date : March 29 2020, 07:55 AM
help you fix your problem Either make a listener on your TableView items list (dataen) or just use the same list for both. Here they use the same list. You could change your list to be of type instead of , otherwise use a listener.
code :
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.converter.NumberStringConverter;

public class ChangePie extends Application {

    @Override
    public void start(Stage primaryStage) {
        ObservableList<PieChart.Data> pieChartData =
                FXCollections.observableArrayList(
                new PieChart.Data("Grapefruit", 13),
                new PieChart.Data("Oranges", 25),
                new PieChart.Data("Plums", 10),
                new PieChart.Data("Pears", 22),
                new PieChart.Data("Apples", 30));
        final PieChart chart = new PieChart(pieChartData);
        chart.setTitle("Imported Fruits");

        TableView tv = new TableView(pieChartData);
        tv.setEditable(true);

        TableColumn tc1 = new TableColumn("Name");
        tc1.setPrefWidth(100);
        tc1.setCellValueFactory(new PropertyValueFactory("name"));
        tc1.setCellFactory(TextFieldTableCell.forTableColumn());

        TableColumn tc2 = new TableColumn("Data");
        tc2.setPrefWidth(100);
        tc2.setCellValueFactory(new PropertyValueFactory("pieValue"));
        tc2.setCellFactory(TextFieldTableCell.forTableColumn(new NumberStringConverter()));

        tv.getColumns().addAll(tc1,tc2);
        Scene scene = new Scene(new VBox(chart,tv));
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

}
Multiple Boolean Binding in JavaFX

Multiple Boolean Binding in JavaFX


By : Walter E. Switzer
Date : March 29 2020, 07:55 AM
around this issue The condition "all check boxes are selected" can only be expressed as a BooleanBinding, not as a BooleanProperty. Basically, the issue is that making that condition false is not clearly defined: there are many ways to do it (i.e. make any non-empty subset of all the checkboxes unselected). Hence you cannot use bidirectional bindings: you have to use listeners on each of the two conditions.
Here is one implementation:
code :
// must keep a reference to the Binding to prevent premature
// garbage collection:

BooleanBinding allSelected ;

private void bindPanelToPackages(CheckBox pane, CheckBox... packages) {

    // BooleanBinding that is true if and only if all check boxes in packages are selected:
    allSelected = Bindings.createBooleanBinding(() -> 
        // compute value of binding:
        Stream.of(packages).allMatch(CheckBox::isSelected), 
        // array of thing to observe to recompute binding - this gives the array
        // of all the check boxes' selectedProperty()s.
        Stream.of(packages).map(CheckBox::selectedProperty).toArray(Observable[]::new));

    // update pane's selected property if binding defined above changes
    allSelected.addListener((obs, wereAllSelected, areAllNowSelected) -> 
        pane.setSelected(areAllNowSelected));

    // use an action listener to listen for a direct action on pane, and update all checkboxes
    // in packages if this happens:
    pane.setOnAction(e -> 
        Stream.of(packages).forEach(box -> box.setSelected(pane.isSelected())));

}
import java.util.stream.IntStream;
import java.util.stream.Stream;

import javafx.application.Application;
import javafx.beans.Observable;
import javafx.beans.binding.Bindings;
import javafx.beans.binding.BooleanBinding;
import javafx.scene.Scene;
import javafx.scene.control.CheckBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class MultipleCheckBoxSelection extends Application {

    private BooleanBinding allSelected ;

    @Override
    public void start(Stage primaryStage) {
        CheckBox selectAll = new CheckBox("Select all");
        int numBoxes = 5 ;
        CheckBox[] boxes = IntStream
                .rangeClosed(1,  numBoxes)
                .mapToObj(i -> new CheckBox("Item "+i))
                .toArray(CheckBox[]::new);

        bindPanelToPackages(selectAll, boxes);


        VBox root = new VBox(10, selectAll);
        root.setStyle("-fx-padding: 15;");
        Stream.of(boxes).forEach(box -> box.setStyle("-fx-padding: 0 0 0 10;"));
        Stream.of(boxes).forEach(root.getChildren()::add);
        Scene scene = new Scene(root, 250, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void bindPanelToPackages(CheckBox pane, CheckBox... packages) {

        // BooleanBinding that is true if and only if all check boxes in packages are selected:
        allSelected = Bindings.createBooleanBinding(() -> 
            // compute value of binding:
            Stream.of(packages).allMatch(CheckBox::isSelected), 
            // array of thing to observe to recompute binding - this gives the array
            // of all the check boxes' selectedProperty()s.
            Stream.of(packages).map(CheckBox::selectedProperty).toArray(Observable[]::new));

        // update pane's selected property if binding defined above changes
        allSelected.addListener((obs, wereAllSelected, areAllNowSelected) -> 
            pane.setSelected(areAllNowSelected));

        // use an action listener to listen for a direct action on pane, and update all checkboxes
        // in packages if this happens:
        pane.setOnAction(e -> 
            Stream.of(packages).forEach(box -> box.setSelected(pane.isSelected())));

    }

    public static void main(String[] args) {
        launch(args);
    }
}
JavaFX Boolean Binding Based on Selected Items in a TableView

JavaFX Boolean Binding Based on Selected Items in a TableView


By : kimi_seth
Date : March 29 2020, 07:55 AM
like below fixes the issue Your binding needs to be invalidated if any of the propPropertys of the selected rows change. Currently the binding is only observing the selected items list, which will fire events when the list contents change (i.e. items become selected or unselected) but not when properties belonging to items in that list change value.
To do this, create a list with an extractor:
code :
final ObservableList<Row> selectedRows = 
    FXCollections.observableArrayList(r -> new Observable[]{r.propProperty()});
Bindings.bindContent(selectedRows, selectionModel.getSelectedItems());
import java.util.Random;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.Observable;
import javafx.beans.binding.Bindings;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.MultipleSelectionModel;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    public static void main(final String[] args) throws Exception {
        launch(args);
    }

    private static class Row {
        private final BooleanProperty myProp;
        public Row(final boolean value) {
            myProp = new SimpleBooleanProperty(value);
        }
        public BooleanProperty propProperty() { return myProp; }
    }

    @Override
    public void start(final Stage window) throws Exception {
        // Create a VBox to hold the table and button
        final VBox root = new VBox();
        root.setMinSize(200, 200);

        // Create the table, and enable multi-select
        final TableView<Row> table = new TableView<>();
        final MultipleSelectionModel<Row> selectionModel = table.getSelectionModel();
        selectionModel.setSelectionMode(SelectionMode.MULTIPLE);
        root.getChildren().add(table);

        // Create a column based on the value of Row.propProperty()
        final TableColumn<Row, Boolean> column = new TableColumn<>("Value");
        column.setCellValueFactory(p -> p.getValue().propProperty());
        table.getColumns().add(column);

        // Add a button below the table
        final Button button = new Button("Button");
        root.getChildren().add(button);

        // Populate the table with true/false values
        final ObservableList<Row> rows = table.getItems();
        rows.addAll(new Row(false), new Row(false), new Row(false));

        // Start a thread to randomly modify the row values
        final Random rng = new Random();
        final Thread thread = new Thread(() -> {
            // Flip the value in a randomly selected row every 10 seconds
            try {
                do {
                    final int i = rng.nextInt(rows.size());
                    System.out.println("Flipping row " + i);
                    Thread.sleep(10000);
                    final BooleanProperty prop = rows.get(i).propProperty();
                    Platform.runLater(() -> prop.set(!prop.get()));
                } while (true);
            } catch (final InterruptedException e) {
                System.out.println("Exiting Thread");
            }
        }, "Row Flipper Thread");
        thread.setDaemon(true);
        thread.start();


        // Bind the button's disable property such that the button
        //     is only enabled if one of the selected rows is true
        final ObservableList<Row> selectedRows = 
                FXCollections.observableArrayList(r -> new Observable[]{r.propProperty()});
        Bindings.bindContent(selectedRows, selectionModel.getSelectedItems());
        button.disableProperty().bind(Bindings.createBooleanBinding(() -> {
            for (int i = 0; i < selectedRows.size(); ++i) {
                if (selectedRows.get(i).propProperty().get()) {
                    return false;
                }
            }
            return true;
        }, selectedRows));

        // Show the JavaFX window
        final Scene scene = new Scene(root);
        window.setScene(scene);
        window.show();
    }
}
Binding a button to multiple boolean values javafx

Binding a button to multiple boolean values javafx


By : yasir irfan
Date : March 29 2020, 07:55 AM
help you fix your problem I have 5 textFields and they all have validators that I have created for them. When the field has been validated and is correct, I call a method that sets a group to become visible:
code :
BooleanBinding accountBind = completeLabel0.isVisible().or(completeLabel1.isVisible());
createButton.disableProperty().bind(accountBind);
BooleanBinding accountBind = completeLabel0.visibleProperty().or(completeLabel1.visibleProperty());
createButton.disableProperty().bind(accountBind);
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